PT1223789E - MAGNETIC SYSTEM FOR SPEAKERS - Google Patents

MAGNETIC SYSTEM FOR SPEAKERS

Info

Publication number
PT1223789E
PT1223789E PT02000890T PT02000890T PT1223789E PT 1223789 E PT1223789 E PT 1223789E PT 02000890 T PT02000890 T PT 02000890T PT 02000890 T PT02000890 T PT 02000890T PT 1223789 E PT1223789 E PT 1223789E
Authority
PT
Portugal
Prior art keywords
magnet
plate
created
gap
aperture
Prior art date
Application number
PT02000890T
Other languages
Portuguese (pt)
Inventor
Paul Cork
Original Assignee
Kh Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kh Technology filed Critical Kh Technology
Publication of PT1223789E publication Critical patent/PT1223789E/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

A loudspeaker having a compact magnet system that produces an increased magnetic flux. A seat has an outer wall that retains an magnet therein such that a channel is defined therebetween. A plate is positioned on top of the first magnet such that an air gap is created between the plate and the wall. A second magnet is positioned over the plate and an aperture is created axially through the second magnet, the plate, and the first magnet. A yoke having a planar region and a protruding region extending therefrom is position over the second magnet such that the protruding region extends through the aperture and connects with the seat. A voice coil is connected to a diaphragm and is moveably suspended within the gap. Application of an electric current to the voice coils causes movement of the diaphragm due to the magnetic flux created within the gap and thereby produces sound waves. <IMAGE>
PT02000890T 2001-01-16 2002-01-15 MAGNETIC SYSTEM FOR SPEAKERS PT1223789E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0101132A GB2371165B (en) 2001-01-16 2001-01-16 Magnet system for loudspeakers
US09/847,692 US6563932B2 (en) 2001-01-16 2001-05-02 Magnet system for loudspeakers

Publications (1)

Publication Number Publication Date
PT1223789E true PT1223789E (en) 2005-07-29

Family

ID=9906922

Family Applications (1)

Application Number Title Priority Date Filing Date
PT02000890T PT1223789E (en) 2001-01-16 2002-01-15 MAGNETIC SYSTEM FOR SPEAKERS

Country Status (8)

Country Link
US (1) US6563932B2 (en)
EP (1) EP1223789B1 (en)
AT (1) ATE291824T1 (en)
DE (1) DE60203329T2 (en)
DK (1) DK1223789T3 (en)
ES (1) ES2240579T3 (en)
GB (1) GB2371165B (en)
PT (1) PT1223789E (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2380309B (en) * 2001-08-20 2005-04-06 Richard Wolfe Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry
JP4463048B2 (en) * 2004-08-27 2010-05-12 アルパイン株式会社 speaker
GB2423908B (en) * 2005-03-02 2008-04-02 Kh Technology Corp Loudspeaker
GB2426884B (en) * 2005-03-02 2008-05-28 Kh Technology Corp Electro-acoustic transducer
US20070025572A1 (en) * 2005-08-01 2007-02-01 Forte James W Loudspeaker
US7706563B2 (en) * 2005-12-19 2010-04-27 Harman International Industries, Incorporated Concentric radial ring motor
US20070297639A1 (en) * 2006-06-21 2007-12-27 Noll Michael A Multiple magnet loudspeaker
EP2135480B1 (en) * 2007-02-22 2018-07-04 Harman International Industries, Inc. Loudspeaker magnetic flux collection system
KR101188921B1 (en) * 2010-03-08 2012-10-08 김동완 Layered Sound Speaker System
WO2012049837A1 (en) * 2010-10-13 2012-04-19 パナソニック株式会社 Magnetic circuit for speaker and speaker using same
GB2489995A (en) * 2011-04-15 2012-10-17 Pss Belgium Nv Magnetic circuit for a loudspeaker driver
US20120275638A1 (en) * 2011-04-26 2012-11-01 Tzu-Chung Chang Sandwich-Type Woofer with Two Sound Wave Propagation Directions and a Magnetic-Looped Device Thereof
US11172308B2 (en) 2015-08-04 2021-11-09 Curtis E. Graber Electric motor
US10375479B2 (en) * 2015-08-04 2019-08-06 Curtis E. Graber Electric motor
US9668060B2 (en) 2015-08-04 2017-05-30 Curtis E. Graber Transducer
WO2019134162A1 (en) 2018-01-08 2019-07-11 深圳市韶音科技有限公司 Bone conduction loudspeaker
US10951991B2 (en) 2019-02-27 2021-03-16 Paradigm Electronics Inc. Loudspeaker

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070530A (en) 1987-04-01 1991-12-03 Grodinsky Robert M Electroacoustic transducers with increased magnetic stability for distortion reduction
DE3730305C1 (en) 1987-09-10 1989-03-23 Daimler Benz Ag speaker
JPH01270497A (en) * 1988-04-22 1989-10-27 Mitsubishi Electric Corp Magnetic leakage preventing type speaker
US5548657A (en) 1988-05-09 1996-08-20 Kef Audio (Uk) Limited Compound loudspeaker drive unit
DE4021651C1 (en) 1990-07-07 1991-06-27 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4225156A1 (en) * 1992-07-30 1994-02-03 Nokia Deutschland Gmbh Magnet system for electro-acoustic transducers
JPH06133394A (en) * 1992-10-20 1994-05-13 Kenwood Corp Structure of speaker
JP3166432B2 (en) * 1993-07-16 2001-05-14 ソニー株式会社 Speaker
JP3625233B2 (en) 1995-12-26 2005-03-02 フオスター電機株式会社 Speaker unit and speaker system
DE19604087C2 (en) * 1996-02-06 1999-07-22 Alfred Ziegenberg Permanent magnet circuits with voice coil arrangements and fluid dynamic cooling for magnet-electrodynamic coaxial drive systems
US5687248A (en) 1996-05-02 1997-11-11 Industrial Technology Research Institute Light weight and low magnetic leakage loudspeaker
DE19618898A1 (en) * 1996-05-10 1997-11-13 Nokia Deutschland Gmbh speaker
JPH10322793A (en) * 1997-05-14 1998-12-04 Sony Corp Speaker device

Also Published As

Publication number Publication date
GB0101132D0 (en) 2001-02-28
GB2371165B (en) 2004-12-22
ES2240579T3 (en) 2005-10-16
US6563932B2 (en) 2003-05-13
ATE291824T1 (en) 2005-04-15
DK1223789T3 (en) 2005-08-01
EP1223789A2 (en) 2002-07-17
US20020094107A1 (en) 2002-07-18
EP1223789B1 (en) 2005-03-23
DE60203329D1 (en) 2005-04-28
EP1223789A3 (en) 2003-08-13
DE60203329T2 (en) 2006-03-23
GB2371165A (en) 2002-07-17

Similar Documents

Publication Publication Date Title
PT1223789E (en) MAGNETIC SYSTEM FOR SPEAKERS
US7706563B2 (en) Concentric radial ring motor
EP2871856B1 (en) Dual coil moving magnet transducer
EP1257148A2 (en) Loudspeaker for a portable communication device
JP2009005358A (en) High efficient miniature electro-acoustic transducer with reduced dimension
EP1173042A3 (en) Compound loudspeaker drive unit having a magnet system
EP1585363A3 (en) Improved audio frequency speaker
JP4385981B2 (en) Electrodynamic speaker
US3766334A (en) Double voice coil loudspeaker
EP0891117A3 (en) Loudspeaker and sound reproduction system employing such a loudspeaker
EP3448062B1 (en) Coaxial dual-voice-coil driver
JP2007129665A (en) Speaker apparatus
KR20080112129A (en) Miniature voice coil with integrated coupling coil
JP7302837B2 (en) Speaker with auxiliary magnet
KR19990041872A (en) Speaker structure with double voice coil
US2494918A (en) Inductively energized electro-dynamic loud-speaker
JP2003163991A (en) Speaker
JP2000188798A (en) Speaker and speaker system
WO2021128004A1 (en) Loudspeaker
KR20040069669A (en) Leakage magnetic flux decrease speaker
JP2000165989A (en) Speaker and speaker system
JP2000253490A (en) Loudspeaker and loudspeaker system
JP2004289649A (en) Electromagnetically-coupled electrodynamic speaker
JPH04329800A (en) Horn type driver
KR20020050621A (en) Speaker of vehicle